Free Data Generators for Developers

Generate realistic fake test data, multi-table relational datasets with SQL INSERT scripts, and US address lists — entirely in your browser. No account, no upload, no cost. Everything from a single seed record to a 5,000-row relational schema ready to import into your database.

All Generator Tools

⭐ Most Powerful

Relational Data Generator

Build 2–5 related tables with real foreign key relationships. Every child record references a real parent ID. Export as SQL INSERT scripts (MySQL, PostgreSQL, SQLite, SQL Server), multi-file CSV/JSON ZIP, or nested JSON.

2–5 tables FK relationships SQL INSERT 5 templates 5,000 rows/table

Open tool → Most Flexible

Custom Fake Data Generator

Build any flat dataset with exactly the columns your project needs. Choose from 50 field types — names, addresses, emails, UUIDs, credit cards, job titles, timestamps, and more. Rename columns to match your schema.

50 field types Rename columns Drag to reorder 10,000 records CSV / JSON / XML

Open tool → Address Specialist

Fake Address Generator

Generate realistic US addresses with real street names, real cities, and correctly paired state/zip codes. Filter by any combination of states. Randomly assigned names — no record matches a real person.

All 50 states Real street names State filter 10,000 records CSV / JSON / XML

Open tool → CSV → Excel

CSV → Relational Excel

Drop multiple CSV files and get a single multi-tab .xlsx workbook with automatic column type detection, PK/FK relationship inference, and a full data dictionary tab.

Multi-CSV to .xlsx PK/FK inference Data dictionary Type detection Auto-fit columns

Open tool →

Which Tool Should I Use?

Need	Best Tool
Seed a database with multiple related tables	Relational Data Generator
Generate SQL INSERT scripts ready to run	Relational Data Generator
Custom columns matching my exact schema	Custom Fake Data Generator
Single flat table, any combination of fields	Custom Fake Data Generator
Address-heavy data, filter by state	Fake Address Generator
Testing a delivery, logistics, or mapping app	Fake Address Generator
Demo environment that looks completely real	Relational Data Generator + templates
Test fixture files for unit tests	Custom Fake Data Generator (JSON, 25–100 rows)
Combine existing CSV files into a documented Excel workbook	CSV → Relational Excel
Infer PK/FK relationships from real data	CSV → Relational Excel

Complete guide covering templates, SQL export dialects, FK strategies, and real-world database seeding workflows.

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Guide How to Generate Custom Fake Test Data: Use Cases, Examples, and Best Practices

Covers database seeding, API testing, staging environments, and all 50 field types explained.

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